Humidifying apparatus



Nov. 15, 1938. c. J. WURMF ELD HUMIDIFYING APPARATUS Filed Dec. 17,1955 2 Sheets-Sheet l Rm m NM R Wm m WQM J n: L

NOV. 15, 1938. c, J wu E 2,136,406

HUMIDIFYING APPARATUS Filed Dec. 17, 1935 v 2 sheets-sheet. 2

INVENTOR. CHARL E5 J WURMFELD ATTORNEY.

' PatentedNovr 15, 1 938 i n e at s hummi mir df pa- [The resultant drying 'or reductionei the]r"e1a t'ivehmhidity of air by the superhea tinrof the moisture available in that anywhere radiation ,1 ir'om-steammeated apparatus is used flior heating, j

-] is,, of c'oiirse, a ,well-known factonboth as to "the lowiefl ectlve comfort derived .trom relatively; hi h lohealthlbf persons iiving 'imderf'such superheated f conditions as are created when heating apparatus 1 off this character isutilizedg Generally, research has been directed toward simple; inexpensive fmanu 'facthi edapparatustor increasing the hu- 15, nudity of, the atmosphere, operatingau'tmnatie' a1- .Yli an'd without supervision. Hu'niidtiyinga'ppa- .:r'atus. resulting from such; research priorfhereto,

vision; does notpin fact; attain l'th desired end,

' -20 and is ex'pe'nsiveftomam factnre,and dii iieult to 1 install.

- 5 twee qr he m ime -"b 5 1d If slxnpl egdevice for cooperation with heat-radiata s'iiihcient quantity or water vapor to assure ,a

T the defects otherwise attributable 'toheatiniirom of jets" orsteam, d1scnarge in'te the fatmosphereg; a

' flow j-oi' ai'r-"in the direction of; the 1 jets. By loeatingthe humiditying apparatus with '-"re1ationto theair eurr'ents derived from heating 0,'steain heatedj radlators.' e

""Me'rely to discharge steam dijrieetly from the stream issuing, into 'jth e atmosphere all j require 1 'consijderationf'By: jap'parfatiis designed in "acwith the invention, thesedifliculties are '1 o ance plete"'s'epara tion of the vapor iro'm 'any. solid or liquid. Only ;after such separation isfthefivapor 1 dischargedinto theatmosphereit thenbeing in as dry a cstate as possible' undersuch circnm Apparatus in aeeordancewith' the-intention is- 59' constructed so'that any 10s; of heat by the steam,

' aslit'approaches the point where, ltdsdisch'arged' into'the atmosphere, from whichcondensate may be formed, will be counteracted, butyin the'event that ii 7 enmmmpn, of-foondensate externally of the" hu- 'd i e a per s i With such "in'cre'ase'd "flow of air, not only v and more uniform of t he air of: a, chamber within which" sueh; heating so'l vedflsince there is eflected substantiaily comstances.fl' A150,, with the solid matterthus're- I moved, the vapor can damage neither thefhumid f ifying' apparatus, nor: fumiturefi'n its iinme'dl'ate' v V thelhurnidifying apparatfls,-wi11 quickly eithe'r -reevaporate; "or absorb, any such moisture. Atthe may be caused to" dis--;

, momma-APPARATUS m pack mm the heatingjmeani orradiaton 'andfiwithsiieh condensate as normally form's in ;=;suoh radiator,- wi11 'be -co'nducted to the proper zr vtu'rm T21, v f? a i ql-lumidif ying apparatus inacordance with the inventiomihi hut slight variation-in one or more elemeiits of its: constrncti n; in 'accordan'c'e with v v f'cettaizi'deflnitestand'ardjm- 4 ltem'per'atiires; and, the active "detriment tofthe charge falfdhe'lntity ofvapor proportioned in ac- *cordane'e withtheiparticuiar' heating means "with atmosphere; At the same time; the general eonstruciiion', and] especially at. the dmt' id,

of stiziziinto the atmosphere, is such C ge during the: pera ion 101 the nummmer K s m e cansmwucnmlndi inK itse manufacture wnqed n .1

At the 1 same timeifsdch factors. as leakage edrip. and-corrosionare nflnimized,-or even completely eliminated.

'A'n' ;ob :|'ect';ot nae mvn tmu mew pro i e: appaanus "of? the fh'araeter stated,- in i vhich' the" ma vapor 'iifed tromwhehumidifler to the atmosphere is such asto 'eauseynet'only midifying' apparatus, biit even: "increased" circula-v ,tion of air past the hunimuymgmppamug; As

ellkn'owtheiafction of jets; and especially apparatus of the tybfdi's dusee'd wo" that the Jet:

associated, or i the 'qtiantity of Z I undesirable or annoying 1m dischargeln fthe same'id ireetionas the normal ei'rc'ula tion" of 'air' magnum heating apparatus there be increased ismadeoperative,butg-fm'therpifthere' apparatus air-flow past sqen hedanu ap iaratus, mam I be any tendency; on the part of-the "di'schalrzing steam-"co n carry 1 moisture along, with it me the The large qu'antitie'soi cirmnatmi pe same time, theflow, past the humidii'ying appaa higher: external densation: withidthe: humidity m "P'Q 1r. at:ea t n,mpprecamenm It is an object of the invention to provide humidifying apparatus for cooperation with heating apparatus using steam as a heating medium, in which the humidifying apparatus is positioned in the currents of. air in motion as produced from the action of the heating apparatus, and in which.

the shaping of the humidifying apparatus is such as to interfere, to a minimum degree, with the flow of air past the heating apparatus. For this purpose, the humidifying apparatus is shaped in substantial conformity with stream-lining principles, so that the flow of vapor from the humidifying apparatus will assist, while the apparatus .itseli does not interfere with, air-flow around and past the heating apparatus.

Other objects of this invention will hereinafter beset forth,.or will be apparent from the description and the drawings, in which are illus trated certain elements considered pertinent for the demonstration of. the invention.

The invention, however, is not intended to be restricted to any particular method of operation, construction, or arrangement of parts, or any article of manufacture specifically herein shown and described, or to any particular application of any such articleor method, or to any specific manner of use, or to'any of various details thereof, herein shown and described, as the samemay be modified in various particulars, or be applied in many varied relations, without departing from the spirit and scope of the claimed invention, the elements herein illustrated and described being merely of types to show some of various forms the invention might take for prac- ,tical purposes.

.On the drawings, in which the same reference characters refer to the same parts throughout and in which are shown the elements mentioned:

c Fig. 1 is a perspectiveview of a steam-heated radiator havingassociated therewith apparatus in accordance with the invention;

Fig. 2 is an elevational yiew of a humidifier in accordance with theinvention, parts being broken away in section-to illustrate theinternal-construction thereof;

Fig. 3- is a cross-sectional view, taken transversely verticallyon the line H through the humidifier shown in Fig. 2:

P 8. 4 isa detail end elevationalview of the casing of the humidifier shown in Fig. 2.

lig. 5 isa perspective viewof elements used in theconstruction of. a humidifier and atran intermediate stage of their assembly, in accordance with the c0nstruction shown in Figs. 2, 3,

and 4, parts being broken away in section to illustrate the method of assembly;

Fig. 6 is a view in perspective, of a humidifier of modified construction, shownbroken away inpart to illustrate theinternal construction thereof; 7

-.pFig. 7 is-a cross-sectional view, taken transversely vertically, on the line 1 1, through the humidifier shown in Fig. 6; and

Fig. 8 is a view, similar to Fig. '7, of a humidifier of modified construction.

- In the construction shown in Figs. 1, 2,3, 4, and

be comprised of a plurality of sections I6, each of which, in -turn,.may have one'or morev columns 5, ahumidifier, l0, embodying certain features of the invention, has been assembled with, and

connected .to,'a stearn-heated radiator l2, here .shown as being of conventional construction, having an'air-venting port l4. Such a radiator may I8 to define openings 20 through the section and between the columns. when assembled, such openings 20 usually become associated in such manner as to produce substantially continuous passages 22 through the radiator. In addition, the sections may be so shaped and their connection to each other may be so formed that air spaces 24 extending transversely between adjacent sections are produced. This construction effectively provides for the movement of air,

heated by the radiator, upwardly away from the heat-radiating surfaces.

In one application of the invention, humidifier i0 is made in such dimensions that it may fit, however snugly, into a through passage 22. Such a humidifier, by means of a duct 26 and a coupling 28 at the end of the duct, is connected into port I to which customarily the air-venting valve for such a.radiator is connected. The'humidifier, for certain purposes of the invention, may be tilted slightly so that its baseline 30 has a downward pitch toward duct 26, which in turn, and with couplings 28, provides a continuously downwardly directed guide for condensate formed in the humidifier, or in the duct leading thereto,

to the radiator.

vThe humidifier of Figs. 1 to 5, inclusive is seen to comprise a casing 32 at the lower end of'which enters duct 25,,and from the upper portion of which, by means of orifices 34, steam may be discharged into the atmosphere. To make the humidifier effective properly to discharge steam into the atmosphere, without danger of also discharging moisture, which might be precipitated ,upon flooring in the immediate vicinity of radiator i2, is an important factor in connection with this invention. By the capability of uninterrupted movement of any condensate from casing 32 back through duct 26 and coupling 28, into the'radiator, such moisture is normally removed out of. relation, to orifices 34.. By its position within passage 22, casing 32 is directly in the air currents initiated by the hot surfaces of the radiator. Being closely adjacent the walls of the columns, and even in direct contact therewith, by making the width of the casing sufficiently large to permit insertion of the casing into pas- I sages 22 with a snug fit, even to the point of exerting slight compression on the walls of the casing, the casing itself will be heated to a high temperature, and will be so maintained. Under these circumstances. there will be no substantial lowering of temperature in the casing to induce condensation, and especially at oriflces 34. In fact, there seems'to be a drying effect upon the steam derived from this cooperation.

By'means of filtering means 36, any moisture discharge from the casing may be prevented. Such filtering means, which may be constructed as hereinafter further described, may also serve to muiiie the discharging steam for eliminating undesirable hissing or whistling as the humidifier spread out a layer of absorbent cotton 48, is slipped within bore 48 of the casing while piece 38 is positioned reversely of the disposition shown 7 shown in Fig; ,3.

three-eighths inch apart. Witha chisel or simiby Fig. 5. 'l'he canvas, with the cotton on top .o! it, is pressed down ,againsta wall 60 of a vro'unded endfl. 'rne canvas is preierably To! sufiicient coarseness'that vapor may pass therethrough. The'abs'orbent cotton maybe medicated, thus reducing, to ami i m, thepossibilities oi the growth of fungi with continued aging or the apparatus.

Qnce the. canvas" and cotton have thus been positioned, a rnetallicfstrap 54 may be inserted into bore 48, and be pressed down against the cotton, thus firmly holding cotton and canvas in position. Now a section 56 of screening,

which may be of coarse mesh, bent into U'shape, is to be located within bore. The screening is soproportioned that, when so' bent, and fitted within bore 46, its legs 58 will extend'substantially'the entire length of walls and 42, with ends 60 biased cutoi the normal plane of legs 68 by the rounding of wall 62 oi the casing, as

tained by strap'j54, the bent screeningsection is the U, made of sufficient width tofit'substantially snugly-within bore 48,"will ride up .againstthe {of the screening, toclamp them betweenthe' cross-bar and wall 50.

same distance,

slid into bore 48, withiegs 58 held substantially together and out, of their normal relation. On release of the screening section within bore 48, and removal of strap 54,- the canvas and cotton will remain within the bore, and cross-bar 64 of cottonand canvas, owing to the natural resiliency Screening 66,..in length, does notencompass the entire extent of casing 32. ,Once the screening" has been positioned," duct "26, which, prei'erably, is a tube of a metal such as copper, capable of being worked readilyto a desired shaping, is-

inserted into bore 46.- The tube is substantially in diameter the same dimension as the bore; r The duct may be inserted; into the; bore aboutone 'inch, in the case of a casingsix'inches in length.

In the same manner, at the otherv end of thebore,

a. plug 66, substantially of the same diameter as duct 26,} may be, inserted i'or substantially the positioned in a, press having dies so formed that,

"on ;op'eration oi the'pressfthe m etal will be def forr'ned as a a shown in Figs. 2 and 4, bringingtogether edges 68 at the openends of the casing. The seams, formed by bringing these edges together, and also around duct26 and plug, are closed in any desired ,rnanner, such as brazing ,orsoldering. Owing to the pressure to which this construction is subjected, assurance against leakage is requisite.

' Duct 26 maybe completed by positioning coupling 28 thereon, this coupling being of any desired standard construction; The length of duct 26 is such that. w h i. nipple 10 inserted and connected into port. 14,; andv with casing 32 positioned in 'passage'22, the duct may be bent tobring nut'12 into engagementwithnipple' I0, thus to [complete the connection between the humidifier and the radiator.

When the assembly, ,.as described, has been made, or even without the addition' oi" the coupling, the entire construction of duct and casing may be completed. A'plui'alit'y of orifices 34 are drilled .throughrounded endf52. Canvas strip 44 need not extend the entire length of theoas- -ing,l)ut merely extend 'sufiiciently on eitherside "or orifices 34 to assure that steam should not escape through the orifices ,unless ,itgfirst pass through the canvas, Crimes 34 may be about With canvas and cotton re- Now,:,with duct and plug m s'ertedfin' thisi man'ner, the entire assembly is lar instrument, a-transverse line indentation-14 maybe produced in :rounded end 62,; between pairs of such orifices In eflect,*thereiore, pairsoi walls 16am thusproduced; irom which are directed such orifices so that, when steam is suppliedunder pressure, jets issuing from the. orifi'ces, ii the orifices'are properly aligned,.will imsound of any noticeable character is heard.

The number of pairs of orifices and the size-o1 the drillings for such-orifices may be variedin accordance with the amount oi steam to .be emitted for a proper-adjustment of the humidity factor. I

At this last operation, the humidifier, after attaching the coupling, is in condition for-use. As will be noted, duct 26' discharges steam into unobstructed bore 48 of the casing, which, in

turnfis heated by the hot air 01- radiator l2, as well'as, in part at least,by'direct contact with the radiator walls." The steam passesth'rough filtering means 36, to issue as jets from orifices 134. As these jets are directedupwardly from the humidifier, and in the generai;-direction of fiow oi "air currents normally produced by the radiator, it naturally follows that these' iets, rather than counteracting normal circulation, will induce and increase such circulation.. In

- addition to this, the rounding of walls "and 62,

serve to stream-line the unit, thereby to e1iminate interference by the humidifier with the nor- *malair' circulation about the radiator.

"In Figs. 6 and'l, there is shown a humidifier" 18, constructed in a somewhat modified manner.

" Suchfhumidifier may be -formed from; a piece of sheet rnetalbent to-iorm s. U-shapedcontainer 80. A duct 62, similar'to duct 26, having a coupling similar to coupling 28, and a plug similar to plug 66, are assembled againstwall .l4,-.i orming the cross-barroi the U. Duct 82, in thiscase,

may extend the entire length of wall 84,.having. orifices 86 formed ,therethrough at intervals. In suchcase, the extreme end or the duct may be plugged.

A covering oijabsorbent cotton 86 maybe positioned over the tube to cover the orifices. To clamp. the covering in position, a U-shaped screen 90 .is formed, the-liege of the U being slightly higher than :thedepth of covering and duct'with which it is to cooperate. This screen is slippeddown through container 60, so that the legs arepositioned immediately over the Icovering, and then the screen is pushed beyond the covering so that the legs clinch around duct 62,

I as shown in Fig. 1. 'By a proper tool, screen 66 may'be driven firmly down into. this position. -End edges .62 of container .60 are closed around duct 82, substantially in the same manner'as described for casing. 32, or by a bent-metal joint. However, walls 94 are left open at the'top end.

Steam, entering container v6|! from duct l2, is discharged through orifices 66, through cotton covering 86, and then passes up between walls 64,

to join with the air currents moving past the radiator. In this case, also, theupward flow of hot ,vapor, together with its directional efi'ect,

enhances the-circulation of the air past the radiator. At the same time, walls 94, heated from the rising hot air, serve to counteract the formation of condensate, heating or superheating the vapor and any moisture entrained therein. The covering serves to muiiie any sounds otherwise derivable from the jets.

In Fig. 8, is shown a humidifier 98, such as appears in my co-pending application, Serial No. 597,854, filed March 9th, 1932. In this case, the construction is similar to that described for container 80, excepteither that orifices 85 need not be used, or that covering 88 is actually a filling for the space between walls 94, with screen 90, as shown in Fig. 8, retaining the filling, and bridging over the mouth 98 of the humidifier.

As shown in Fig. 6, duct 82, which may be formed and arranged similarly for either of the constructions of Figs. 6 or 8, like duct 26, extends outwardly beyond container 80, and then downwardly, to provide means for retention of a reducing nipple I00, associated with an L I02,

, which, in turn, is retained by a coupling I04 carried at the end of duct 86. Nipple I00 includes a wall I08, having a small orifice I08 therethrough, for controlling fiow of steam to the humidifier. The reducing L is screwed into an opening in the radiator wall, and the humidifier is fixed in position by engaging the L by coupling I04 at the end of duct 82. In this manner, the entrance to duct 82 is governed by orifice I08. It has been found that, to effect the purposes of the invention, it is desirable that the passage area of orifice I08, then nipple I00, and finally conduit 82, increase by gradual stages, but, finally, the passage area of conduit 82 is less than the effective areas of orifices 88, while the extent of opening across the mouth of container 80 is greater than the area of orifices 86.

Many other changes could be efiected in the particular elements designed, and in the methods of manufacture and use, and in the apparatus therefor, and in the article manufactured, herein set forth, and in specific details thereof, without substantially departing from the inventionintended to be defined in the claims, the description being merely of elements illustrating certain phases of the spirit of the invention.

What is claimed as new and useful is:

1. Apparatus for producing a substantially uniform discharge of water vapor into the atmosphere to increase its humidity without condensation of the vapor, the apparatus including a casing, the casing being provided with means for venting water vapor upwardly into the atmosphere away from the casing, the casing being tubular, the tube being defined by a pair of vertically extending substantially parallel walls and end walls extending between the parallel walls, the distance between the parallel walls being less than the height of a parallel wall, the venting means being positioned in the upper portion of the casing, the bottom end wall being shaped to facilitate air-flow upwardly past the casing, and a conduit having an. end inserted a short distance into the bore of the casing, the end resting upon the bottom end wall, the parallel walls being pressed around the conduit end to seal the casing at that end.

2. Apparatus for producing a substantially uniform discharge of water vapor into the atmosphere to increase its humidity without condensation of the vapor, the apparatus including a casing, the casing being provided with means for venting .water vapor upwardly into the atmosphere away from the casing, the casing being tubular," the tube being defined by a pair of vertically extending substantially parallel walls and end walls extending between the parallel walls, the distance between the parallel walls being less than the height of a parallel wall, the venting means being positioned in the upper portion of the casing, both end walls being shaped to facilitate air-flow upwardly past the casing, and a conduit having an end'inserted a short distance into the bore of thecasing, the end resting upon the bottom end wall, the body of the casing extending away from the conduit end, the parallel walls being pressed around the conduit end to seal the casing at that end.

3. Apparatus for producing a substantially uniform discharge of water vapor into the atmosphere to increase its humidity without condensation of the vapor, the apparatus including a casing, the casing being tubular, the tube being defined by a pair of vertically extending substantially parallel walls and end walls extending between the parallel walls, the distance between the parallel walls being less than the height of a parallel wall, the bottom and top end walls being convexed to facilitate air-fiow upwardly past the casing, a conduit having an end inserted a short distance into the bore of the casing, the end resting upon the bottom end wall, the body of the casing extending away from the conduit end, the parallel walls being pressed around the conduit end to seal the casing at that end, the top end wall being indented transversely of its convexity to form sloping walls intermediately of the convexity, and orifices opening through the sloping walls and communicating with the bore of the casing.

4. Apparatus for producing a substantially uniform discharge of water vapor into the atmosphere to increase its humidity without condensation of the vapor, the apparatus including a casing, thecasing being tubular, the tube being defined by a pair of vertically extending substantially parallel wallsfand end walls extending between the parallel walls, the distance between the parallel walls being less than the height of a parallel wall, both end walls being convexed to facilitate air-flow upwardly past the casing, a conduit having an end entering the bore of the casing immediately at the bottom end wall, the top end wall having a pair of sloping faces, and orifices opening through the sloping faces and communicating with the bore of the casing, the

,formation of the orifices in the faces being such that jets of vapor issuing from opposed faces will impinge one upon the other.

5. Apparatus for producing a substantially uniform discharge of water vapor into the atmosphere to increase its humidity without condensation of the vapor, the apparatus including a casing, the casing being tubular, the tube being defined by a pair of vertically extending substantially parallel walls and end walls extending between the parallel walls, the distance between the parallel walls being less than the height of a parallel wall, both end walls being convexed to facilitate air-flow upwardly past the easing, a conduit having an end entering the bore of the casing immediately at the bottom end wall, the top end wall having orifices formed therethrough and communicating with the bore of the casing, the formation of the orifices being such that Jets of vapor issuing from the orifices will be directed toward each other and will impinge one upon the other.

40 a g g 1 form discharge' -oiwater vapor into: the atmos- 145' V v v vertically-of its-transversecross-section, the case v I 9,186,406 3 w en; m producing a substantially "uni form'disch', surge of water-vapor into 'theatmo'sT- phere to increase its humidity without iconden's a th th avm s m ms 'cw; eme'lm benmmr: t m e.

fined by" a pair of vertically *extending substan flamed-analwaus 'mdqena walls extending i -tween the arallel ,wallsythe' distance between a mt P r e W s'sithah th h s t I oi' 'fa-parallel wall; bothfend walls' bein'gconvied to' iacilitate airfiowupwardly-past;the'casing, a" I conduit-having end-entering the hore of'the j a casing immediately at 'the' bottom end-"walh'fthe top'end having oriflces iormed-therethrough c(in rnur'i'ic'ati ng with the bore of the easing; the torination 'of-theorifices being such-thatdetfs of'fvapor issuingiro'm' the orifices will be directed toward 'ea chother andwill"flrnpinge one upon the omen-anagas-meringue; positioned in the casing" bore at 'the orifices.

7:. Apparatus Ior producing a substantially-uni form discharge: oi water vap'or into the atmos'- pher to increase its humidity without condensa tion oi V the vapor,-1 the fapparatus -includinra casing'having an inlet atth'e lower portionthere= of} the casing being tubular and being 'less "in Width than in height, the tube of the casingim cluding' botto'rnjahd top walla' bcth bottom and top walls beln'gklconvexed'j to iacili'tatefialr-ilow inwardly-hash the casin the top wen; of? the as ng-having orifices? formed thc-i'ethroii'gh' and I communicatingfwith" thefbore of the casing, the formation "ot- 'the' orifices being' such that Jets 7 otivapor fissuingfromthe orifices wlllfbedirecte'd mard e hbt er andwuumpihgeon u'p'o'n 'the other; gas-ifiltering means positioned finf the'cas nsh e apparel; for producing a'substanti ally i phere to increase its {humidity without condensa-j tiono'i the vaporpthe --apparatus including a casing havi g an'inlet at the lower portion thereoi'lthe casing being tubular and'being" elongate in; having' outwardly" convexed; top and bottom to facilitate air-flow upwardly pastthe cas-- ingfithe top=wall having orifices?- formedgthere f through and'communicatin'g' with the bore ofthe casing.'the-iormation oftheorificesiinthe wall being suchthat Jets oi vapor issuing from the orifices be directed toward each other and will impinge one upon the othengas-illtering means positioned in the casing bore at the orifices and a screen of U-shaped transverse cross-1 section inthe casing borei'or retaining the gasfiltering means in position, the screen 'beingpositioned in the casing so that its U is inverted with the bottom ofthe U inengagement with the gas-filtering means. V

9. Apparatus for producing a substantially uniform discharge of water vaporinto the atmos- ,phere-to increase, its humidity without condensation of the vapor,,the apparatusincluding a casing having an inlet at the lower 'portiontherei oi. the casing being tubularfand being elongate vertically oiits transverse cross-section, the casing having outwardly convexed top and bottom walls to facilitate air-flow upwardly past the casa ing, the %top wall having orifices formed therethrough and communicating with the bore of the casing, the formation of the orificesin the wall being such that jets of vapor is suingirom the orifices will be directed toward each other and filtering means in-.positionpthe' screen :being tioned in the borth't grits :U is inverted upwardly byengagementgagainst the-bottom- Iorming auchamber. andcbeingwgreaten'in :length n I a p impinge one upon other, gas-filtering means positioned in the bore; at the;

flees, and a screen of U-"shapedtransverae cross *section in the casing bore-tor retaining the with" thez-bottom oi the'U: in engagementwith the gas-filtering means," armsjot; the Uwextend-f ing downwardly: and being compressedand qurged l6 i than-height; the inlet opening into the.:chamher at. the lowerelongatediportion thereoipithe ing havingan-joutlet 'iromdthe upper portion thereof, fa" packing within the chamber between the outlet tion oi" the inletswith'ithe' chamber; anda screenior retaining the packing imposition,- thapassage area-or the "conduit; bein'g 'less w and) the passage,

area 01' theoutlet being greater than the'efleetive passage area at'the opening of the'ginlet intogthe a e a f 11. A humidii'ying attachment; for" a steam I source, tlieattachment including a and 1 an -"inleteto', the the ineluding a casing .iorming a; chamber, g.the inlet l including :a duct extending xalongi the bottomgoi:

the w: chamber; the; duct having {In plurality of; openings "in the chamberithe casing outlet iro'm "the? chamber 1 aththe, upper thereotfia packingwithin the the outlet and--thevopenings,'--and a" screen iorfre taming .the packing imposition", thezpassa'ge area of-the duct being less andthe passagearea oifitha,

outlet-being 'greatergithan-the eflectives 12'.lIn-"combinationwith a-s'team-heatingradie: 0

area of the-openings. ator having anair passage'fextendingthmgh the,

Y body-thereon anhumidmer :irornthe radiator; (and means'ioriconnectingthe. humidifier to'the radiatorytheconnectingmeans Y com rising a substantially continuously-upward?- llydirecte d conduit f orreceivingsteam mm'i'me I radiator;and'conducting it ;to thez-humidifierathei passage through \zhe conduit being -'.clear otwstopes ping means; the hu nidifiemthe conduit, radiator:v being gso related; that condensatei'will tend to" flow reversely 'oi the steam" fiows'and bach to -the radiator; the humidifier =comprisingelongate; casings-the cross-section' oithe casingtransversely of its lengthbeing such that the humidifier may fit substantially closely within the;

passage; the conduit discharging into the casing:

the casing providing means for maintal l l in vaporous condition steam'discharged thereinto;

3 and for so directing the steam outwardly into the passage as to assist the movement of air currents 3 induced by the radiator.

13; In combinationwith a steam-heating radi ator having an air passage extending through the I body thereof, an humidifier fol-discharging steam from the radiator; and means for connecting the humidifier to the radiator, the connecting comprising a conduit for receiving steami'trom.

the-radiator and conducting it'to the humidifier, -o 70 I the passage through the conduit being clear 6!. stopping means; the humidifier, the conduit, and

the radiator being so related that condensate will tend to flow reversely oi the steam fiow and back to the radiator; the humidifier comprising an elongate casing; thejcross-section of the casing l0 10.v Al: humidiiyingii attachment iorl a source, the; attachment including a an'inlet to. thebody; andaconduit connected-ita the: inlet, 1 the diflusingbody including. a

transverselyo! its length being such that the humidifier may fit substantially closely within the passage; theconduit extending into and along the bottomv oi the casing, and being in openxcommunication with the casing withinthe casing;ithe casing providing means for main taining'in vaporous'condition steam discharged thercinto,'and tor sc -directing the steam outwa'rdly into'thepassage as to assist the movement of air currents induced bythe radiator; I

- 14;- In combination with a steam-heating radiator having an air passageextending through the bodyjthereoi; an humidifier ior'discharging steam-from the radiator; and means for connecting the humidifier to the radiator,.the connecting means/comprising a conduit for receiving steam from the radiator and conducting it to the humidifier, the passage through .the conduit being clear of stopping means; the humidifier, the conduit, and the radiator being so related that condensate will tend to fiow reversely oi the steam fiow'and back to the radiator; the humidifier comprising an elongate casing; the casing be,- ing substantially an elongated U incross-section transversely oi'its length so that. the humidifier may fit substantially closely within the passage; the conduit extending into the casing and fitting snugly in the bottom-oi the U; the conduit having openings .directed into the casing; the casing oomprisingmeans for maintaining in vaporous condition steam discharged thereinto, and for so directing the steam outwardly into the passage to amist the movement or air currents induced by, the radiator; the casingha'ving means therewithin and above the conduit ior'muiiiing the ,dis-a charge oisteam from the openings.

' 15. The combination 0! .a steam heated radiato made up of a plurality of conventional ,multicolumn sections;' a humidifier for discharging steam from the radiator; conduit means ior connecting the humidifier to the radiator; the conduit means and humidifier being'so constructed and-arranged relative to theradiator that condensate 'i'ormedzin said humidifier will tend to gravitateto the radiator; the humidifier com.- prising an elongated casing positioned longitudinally of the spaceiormed longitudinallyoi the radiatorbythe columns of the sections of; the radiator, the dimensions of the casing transversely of its length being such that the humidifier fits closely within said space, the casing being provided with discharge apertures throughout its lengthso directed that the discharged steam assists the upward'fiow of air currents over the radiator, the vhumidifier also comprising means for maintaining in vaporous condition the steam discharged thereinto.

16. The combination with a steam-heated radiator; a humidifier for discharging steam from theradiaton. conduit means for connecting the humidifier to the, radiatorf the humidifier and the conduit means being constructed and arranged relative to the radiator that condensate iormed in said humidifier will tend to gravitate to the radiator; the humidifier comprising an elongated casing; the casing, when the humidifier is in position, being disposed substantially horizontally and immersed directly in the air-stream induced by the radiatori thecasingbeing disposed with its side walls extending in substantially the same general direction as the direc: tion of the air-stream; the: casing having an opening in the direction oithe movement oi the. air-stream past. the casing so that the steam discharged from the casing will assist the upward fiow 0! air currents over the radiator and the casing will interfere to a minimum degree with the movement .of the air currents, the humidifier also comprising means iormaintaining in vaporous condition the steam discharged thereintm,

17. The combination with a steam-heated radiator; a humidifier for discharging steam from the radiator; conduit'means for connecting the humidifier to the radiator; the humidifier and the conduit means being so constructed and arranged relative to the radiator that condensate formed in said humidifier will tend to gravitate to the radiator; the humidifier comprising an elongated casing; the casing, when the humidifier is in.

the movement of the air currents, the humidifier also comprising means-for maintaining in vaporous condition the steam discharged thereinto.

CHARLES J. WURMF'ELU 

